Greer reminds me of Germaine Greer and Greer Garson, and Vivaldi is obvious; I think I would continue the theme.

• Basie — Count Basie; could be a nn for Basil.
• Django — Django Reinhardt.
• Aalto — Finnish “wave”; Alvar Aalto.
• Yves — Yves Saint Laurent.
• Tristan — Tristan Tzara.
• Matisse — Henri Matisse.
• Benoit — French form of Benedict; Georges Benoît, Pierre Benoît and others.
• Thoreau — Henry David Thoreau.
• Miro — Slavic “peace”; Joan Miró (his surname is of different origin though).
• Eero — Finnish form of Eric, Eero Saarinen.
• Keats — John Keats.
• Eames — Charles and Ray Eames.
• Calder — Alexander Calder.